Goodbye to Devialet - after upgrade program

[RebelMan]

Wouldn't it be better in most cases to just get a second unit to double up in terms of SQ improvements ?

I mean, going from D200 to D400 by getting a second D200 seems as though it would offer a larger improvement in sound and be far more cost effective.

There are some very very good deals on the current models at the moment and that too me is far more attractive than the upgrade price offered for the D200 to move up.

No.  More power does not equate to better sound quality.  More power equates to more output (SPL) and more headroom but that's all.  Unless your system requires more power to suppress potential distortions from driving the volume up it would be unnecessary to increase it.

It's not just a matter of power although with many speakers that certainly helps.

Dual mono configuration divides by a factor of 4 distortion and minimises crosstalk with a gain in lateral information and image realism.

If I were a 200 owner I would be faced by a bit of a quandary here, and I say that knowing first hand what the benefits of some of the Pro innovations are. 

Guillaume

True but the architecture doesn't change, the formula is identical between them.  When the units are combined they enter a quasi mode of differential signaling.  This mode will suppress distortion and thereby improve signal separation (quality) which can be audibly observed if the noises were sufficiently large to begin with.  Given that we have the ability to detect distortions as low as 0.1% it's becomes increasing difficult beyond that but even if it were likely it would be physically impossible to detect them down to 0.001% much less 0.00025%.  The harmonics that are produce will amplify this some but not enough to be noticed before the signal decays.  As the Pro uses new architecture the variables are changed as will the results be.